JPH0636705U - Drill mounting body for drilling machine - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a drill mounting body for a drilling machine, which enables drills having different diameters to be exchanged with one touch, thereby improving workability of exchanging the drill. [Structure] Drills 3 having different diameters are attached and fixed to a collet 17 in advance. A spring 16 is wound around a holder 10 that is attached and fixed to the drill chuck 2, and a collet to which a drill is attached is inserted into an attachment hole 11 of the holder and retained and held by the spring. The key portion 21 of the collet fits into the key groove 14 of the holder, and the rotation of the holder is transmitted to the collet, which is the rotation of the drill. When changing the drill, pull the collet,
Elastically deform the spring and pull it out of the holder together with the drill. If another collet with a drill attached is inserted into the holder, the key portion of the collet fits into the key groove of the holder, and the positioning notch engages with the spring.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a drilling machine used for making a hole in a workpiece, and in particular, a drill mounting body that enables detachable attachment of a drill of various diameters to a drill chuck of the drilling machine with one touch. Regarding

[0002]

[Prior art]

 For example, a work piece such as a body is provided with a hole portion if necessary. The hole is cut using a drilling machine. Needless to say, the drilling machine is also called a drilling machine. FIG. 3A shows a generally used portable type so-called hand drill (handball). In this, a drill chuck 2 is provided at the tip of a drill body 1, and a drill 3 is detachably attached and fixed.

The above-mentioned drills 3 are available in various diameters according to the machining requirements. If it is necessary to replace the drills 3 with different diameters, use a replacement tool as shown in FIG. By using the chuck handle 4 described above, the claw of the drill chuck 2 is enlarged, the drill 3 already used is removed, a new drill 3 is inserted into the claw, and the chuck handle 4 is reversely rotated. The claw is squeezed, and a new drill 3 is attached and fixed.

[0004]

[Problems to be solved by the device]

 In this way, it is of course necessary to prepare a drill 3 matching the diameter of the drilled hole, and as soon as the drilling of that diameter is completed, use the chuck handle 4 and replace it with a drill 3 of a different straight diameter each time. There must be. If the number of replacement drills is large, it becomes a troublesome operation that cannot be ignored.

Further, unlike a stationary drilling machine (drilling machine), the hand drill shown in the figure is convenient to use in a place where the working place is not constant, but a chuck necessary for exchanging the drill 3 is required. It is extremely troublesome to carry the handle 4 together.

Since some workers may lose the chuck handle 4, the chuck handle 4 may be hung from the drill body 1 via the attachment string. However, in actual drilling work, these chuck handles 4 are rather suspended. Will get in the way.

Therefore, particularly for the above-mentioned hand drill used when the processing place is not constant, a replacement tool such as the chuck handle 4 is not required, and the hand drill itself is left as it is, and the drill 3 of various diameters is used. There is a great demand for something that can be replaced very easily.

The present invention has been made in view of the above circumstances, and an object of the present invention is to attach drills of a drilling machine for improving workability by making it possible to replace drills having different diameters with one touch. To provide the body.

[0009]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a drilling machine for removably attaching drills of various diameters to a drill chuck and performing drilling on a workpiece with the drill.

The drill chuck is provided with a mounting hole from its end face along the axial center, and a holder having a key groove cut out from the end face to the outer peripheral surface and the mounting hole is mounted and fixed. Then, along the outer peripheral surface of this holder, provide a spring groove that crosses the key groove part, fit a spring in this spring groove, attach drills of various diameters to the collet, and fix it,

This collet has a shaft portion that can be inserted into and removed from a holder mounting hole and a key portion that can be inserted into and removed from a key groove, and a positioning notch is provided in the key portion so as to face the spring groove. A drill mounting body for a drilling machine, which is detachable from a spring and detachably mounted and fixed to a drill chuck via a holder.

[0012]

[Action]

 In advance, drills of different diameters are attached and fixed to the collet.

A spring is wound around the holder that is attached and fixed to the drill chuck, and the collet to which the drill necessary for machining is attached is retained by the spring while being inserted into the attachment hole of the holder. It The key portion of the collet fits into the key groove of the holder. Therefore, the rotation of the holder is transmitted to the collet, and the rotation of the drill causes the drilling. When replacing the drill with a different diameter, pull the collet to elastically deform the spring and pull it out of the holder together with the drill.

If another collet with a drill of the required diameter is inserted into the holder, the collet's key part fits into the holder's key groove, and the positioning notch engages with the spring. It can be attached to one-touch.

[0015]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, a mounting body S of the drilling machine is configured. In the figure, 2 is a drill chuck provided in the hand drill which is the drilling machine described above with reference to FIG.

A holder 10, which will be described later, is attached and fixed to the drill chuck 2. That is, once the holder 10 is attached and fixed to the drill chuck 2, it is not necessary to remove it even when the drill 3 is replaced. In other words, any modification to the hand drill used up to now is required. Not.

The holder 10 has a cylindrical holder body 12 provided with a mounting hole 11 along the axis from the lower end surface to a middle portion in the figure, and is integrally connected to an upper portion of the holder body 12. , A fixing portion 13 fixed to the drill chuck 2.

A key groove 14 is cut out from the lower end surface of the holder main body 12 to the midway portion thereof along the outer peripheral surface and the mounting hole 11. Further, an annular spring groove 15 is provided along the outer peripheral surface of the holder body 12 and in parallel with the lower end surface so as to cross the key groove 14 portion.

In the spring groove 15, a circular annular spring 16 which is partially cut out is elastically fitted. That is, the diameter of the spring 16 is formed smaller than the diameter of the spring groove 15, and when the spring 16 is inserted into the holder body 12, the diameter is enlarged against this elastic force and the groove 15 If the urging force is removed while the spring 16 is applied to the spring 16, the spring 16 is held in its original position by its elastic force.

On the other hand, 17 is a collet, which is prepared for each drill 3 having various diameters. Therefore, although only one is shown in the figure, there are numbers that match the number of drills 3.

In the figure, the collet 17 has a shaft portion 18 formed on the upper side in the drawing with a diameter that can be removably inserted into the mounting hole 11 of the holder 10, and on the lower side with a special drill 3 inserted therein. It serves as a drill fixing portion 20 that is fixed by attaching a non-rotating plug screw 19. If a flat surface portion 3a serving as a rotation stopper seat surface is provided on the upper portion of the drill 3, the rotation stopper plug screw 19 securely attaches and fixes the drill 3 thereto.

A key portion 21 is integrally provided on the shaft portion 18 of the collet 17 along the axial direction on the peripheral surface thereof, and can be inserted into and removed from the key groove 14 of the holder 10. Further, a positioning notch 22 having the same cross-sectional shape as that of the key portion 21 is provided at a predetermined position, that is, a position where the key portion 21 is inserted into the key groove 14 and communicates with the spring groove 15.

Therefore, with the shaft portion 18 of the collet 17 inserted into the mounting hole 11 of the holder 10 and the key portion 21 inserted into the key groove 14, the spring groove 15 and the positioning notch 22 are inserted. The spring 16 is elastically fitted over and to prevent the collet 17 from coming off. Then, the drills 3 having different diameters are attached to the collet 17 and fixed in advance to be prepared.

On the other hand, the holder 10 is attached and fixed to the drill chuck 2, and the collet 17 to which the drill 3 inserted therein is attached is retained and held by the spring 16.

When the drill 3 is switched on and energized, the drill chuck 2 is rotationally driven, and the holder 10 integrated with this is rotationally driven. Further, the rotational driving force is transmitted to the collet 17 via the key groove 14 of the holder 10 and the key portion 21 of the collet 17, and the drill 3 fixed there rotates to perform the necessary drilling. When drilling with different diameters is required, the drill 3 with the appropriate diameter must be replaced.

At this time, when the collet 17 currently attached to the holder 10 is pulled downward, the positioning notch 22 rides over the spring 16 and the key portion 21 elastically deforms so as to enlarge the diameter of the spring 16.

Very easily, the shaft portion 18 of the collet 17 is pulled out from the mounting hole 11 of the holder 10 and pulled out of the holder 10 together with the drill 3. That is, the removal of the drill 3 from the drill chuck 2 can be done with one touch.

Then, the collet 17 to which the drill 3 having an appropriate diameter is attached can be attached to the holder 10. Specifically, the shaft portion 18 of the collet 17 may be inserted into the mounting hole 11 of the holder 10 and the key portion 21 may be inserted into the key groove 14.

When the positioning notch 22 provided in the key portion 21 coincides with the position of the spring groove 15, the spring 16 is elastically fitted over these and the collet 17 is attached. That is, the attachment of the drill 3 to the drill chuck 2 can be done by one-touch.

After all, the collet 17 to which the drill 3 is attached can be attached and detached with one touch through the holder 10, and the work can be performed extremely quickly and reliably.

In the above embodiment, the hand drill is applied as the drilling machine, but the drilling machine is not limited to this and may be a stationary drilling machine. It is sufficient if the structure is such that the drill 3 is detachably attached to the drill chuck 2.

[0032]

[Effect of device]

 As described above, the present invention is

Since the collet to which the drills corresponding to various diameters are attached and fixed is detachably attached and fixed to the holder attached and fixed to the drill chuck via the spring, a replacement tool such as a conventional chuck handle is used. Is unnecessary, and drills with different diameters can be replaced with one touch, improving the workability of drill replacement.

[Brief description of drawings]

FIG. 1 is a front view showing a part of a drill mounting body of a drilling machine according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the drill mounting body of the embodiment.

FIG. 3A is a side view in which a part of the hand drill is omitted. (B) is a side view of a chuck handle as a replacement tool, which is conventionally used.

[Explanation of symbols]

2 ... Drill chuck, 3 ... Drill, 11 ... Mounting hole,
14 ... Key groove, 10 ... Holder, 15 ... Spring groove, 1
6 ... Spring, 18 ... Shaft part, 21 ... Key part, 22 ... Positioning notch, 17 ... Collet.

Claims (1)

[Scope of utility model registration request] 1. A drill machine for detachably attaching drills of various diameters to a drill chuck for making a hole in a workpiece by the drill, which is attached and fixed to the drill chuck and extends from the end face to the axial center. And a holder having a key groove cut out from the end face to the outer peripheral surface and the mounting hole, and the holder is provided along the outer peripheral surface of the holder across the key groove portion of the holder. A spring groove, a spring fitted in this spring groove, and a drill corresponding to various diameters are attached and fixed, and a shaft part that can be inserted into and removed from the mounting hole of the holder and a key part that can be inserted into and removed from the key groove are attached. In addition to this, the key portion is provided with a positioning notch that is provided so as to face the spring groove and that can be detached from the spring. A drill mounting body for a drilling machine, comprising: a collet detachably attached and fixed to a chuck.